General business items: Sales of lifting machinery and its components, construction machinery and its components, steel structures, three-dimensional warehouses, construction machinery and equipment, port loading and unloading equipment, and electrical equipment; Design, construction and technical consultation of Electromechanical Engineering (except special equipment and permitted and prohibited projects); Import and export business of the above products; Technology development, technology transfer, technical consultation and technical services of electromechanical products (except special equipment and licensed and prohibited projects); Crane rental. (for projects subject to approval according to law, business activities can only be carried out after approval by relevant departments)